The key to storage of solar energy is to obtain highly concentrated hydrogen peroxide (HO). However, achieving the versatility of reaction, separation and collection in a one-step process is a great challenge. Herein, a ZnInS/porphyrin-based porous coordination network (ZnInS/PCN-222, abbreviated as ZIS/PCN) heterojunction with strong electron/energy transfer was prepared for HO production and organic synthesis in a two-phase system. Interestingly, ZnInS regulated the hydrophilicity/hydrophobicity of PCN-222, enhanced oxygen adsorption and optimized the reaction system. Thus, hydrophobic ZIS/PCN photocatalysts were selectively dispersed in the organic phase, while the generated HO existed in the aqueous phase, achiveing the spontaneous seperation and collection of HO. The results showed that the HO production (302 mM) in ZIS/PCN systems was 1.7 and 107.7 times higher than that in PCN-222 and ZnInS systems, respectively, and 7.7 times higher than reported MOF-based photocatalysts in similar systems. This work widens the application of heterojunction engineering in HO photoproduction.

中文翻译：

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Zn3In2S6/PCN-222异质结构太阳能驱动生产高浓度过氧化氢

太阳能储存的关键是获得高浓度的过氧化氢（H2O）。然而，在一步过程中实现反应、分离和收集的多功能性是一项巨大的挑战。在此，制备了具有强电子/能量转移的ZnInS/卟啉基多孔配位网络（ZnInS/PCN-222，简称ZIS/PCN）异质结，用于两相系统中的H2O生产和有机合成。有趣的是，ZnInS调节PCN-222的亲水性/疏水性，增强氧吸附并优化反应体系。因此，疏水性ZIS/PCN光催化剂选择性地分散在有机相中，而生成的H2O存在于水相中，实现H2O的自发分离和收集。结果表明，ZIS/PCN 体系中的 H2O 产量（302 mM）分别比 PCN-222 和 ZnInS 体系高 1.7 倍和 107.7 倍，比报道的类似体系中的 MOF 基光催化剂高 7.7 倍。这项工作拓宽了异质结工程在 H2O 光生产中的应用。